New BytesFormatter to unify all bytes formats

Change "480 B" to "480 byte".

Also the formatWithUnits for use case where need to render number and
units separately.

Bug: 321861088
Flag: EXEMPT bug fix
Test: manual - App data usage
Test: unit test
Change-Id: Ic54d16d08613dc6fca6a38263b71bcf0acac31df